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Find the best SIM for your device

Explore our SIM deals

Choose your SIM

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Pay Monthly SIMs

Keep the phone you love and get all the data you need. Take your pick from our 12 and 24-month Pay Monthly SIM Only deals.

Choose a SIM
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More data, same price

Enjoy more data for up to three months at no extra cost, with selected Pay As You Go SIMs. Already with O2? Text MORE to 2424.

Get yours

Latest Pay Monthly offers

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Half price 40GB Ultimate Plan

£15.24 a month for 12 months, then £32.29 a month. Rises to £16.14 from April ’26, £34.09 from April ’27.

See more
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Half price 150GB Ultimate Plan

£17.24 a month for 12 months, then £36.29 a month. Rises to £18.14 from April ’26, £38.09 from April ’27.

See more
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Half price Unlimited Ultimate Plan

£21.24 a month for 12 months, then £44.29 a month. Rises to £22.14 from April ’26, £46.09 from April ’27.

See more

Pay As You Go SIMs

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Big Bundles

Enjoy awesome perks and great-value tariffs with unlimited minutes and texts

Dive in

Rolling plans

The easiest way to pay without a contract

Find out more
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Need to top up?

Find out how to top up your Pay As You Go devices

See your options

Perks for being with O2

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Data rollover

Didn’t get through all your data? Let’s keep it rolling.

Find out more
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Roam freely in the EU

Unlike other major networks, we don't charge extra for EU roaming, up to 25GB

Get on board
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Priority

Jump into a world of exclusive rewards and experiences. It’s our way of saying thanks for being with us.

Let’s go

Looking for another SIM?

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Tablet SIMs

Pick a SIM for your tablet or dongle

See the deals
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Smartwatch eSIMs

Connect your cellular smartwatch with a Pay Monthly eSIM

See smartwatch eSIMs
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Mobile broadband SIMs

Stay connected while you’re on the move

Find out more
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